Finding the Fourth Proportional to 10,520,686,619.78, 15,779,056,964.06 and 5,278,887,404.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,520,686,619.78 : 15,779,056,964.06 = 5,278,887,404.42 : x
2. Step 2: Convert to fraction form
   10,520,686,619.78/15,779,056,964.06 = 5,278,887,404.42/x
3. Step 3: Cross multiply
   10,520,686,619.78x = 15,779,056,964.06 × 5,278,887,404.42
4. Step 4: Simplify right side
   10,520,686,619.78x = 83,295,865,061,202,018,304
5. Step 5: Solve for x
   x = 83,295,865,061,202,018,304/10,520,686,619.78
6. Step 6: Final answer
   x = 7,917,341,146.21